Aluminocerite-(CeCa)

aluminocerite-(CeCa)

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Formula: (Ce₆Ca₃)☐Al(SiO₄)₃(SiO₃OH)₄(OH)₃
Nesosilicate (insular SiO₄ groups), cerite subgroup, cerite group, cerite supergroup
Crystal System: Trigonal
Specific gravity: 4.675 calculated
Hardness: 5
Streak: White
Colour: Pale pink to reddish pink
Weakly RADIOACTIVE
Environments

Plutonic igneous environments
Pegmatites

Localities

There are two co-type Localities, Scala dei Ratti Quarry, Feriolo, and the Seula mine, Mount Camoscio, Oltrefiume, both at Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy.
At the Ratti quarry aluminocerite-(CeCa) occurs in millimeter-sized secondary cavities hosted in aplite - pegmatite veins and pods within granite. At the Seula mine it occurs in centimeter-sized cavities in granite (AM 94.487-493).

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